669277619 has 4 divisors (see below), whose sum is σ = 671263944. Its totient is φ = 667291296.

The previous prime is 669277577. The next prime is 669277663. The reversal of 669277619 is 916772966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 916772966 = 2 ⋅458386483.

It is a cyclic number.

It is not a de Polignac number, because 669277619 - 2⁸ = 669277363 is a prime.

It is a super-2 number, since 2×669277619² = 895865062588618322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669277699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992657 + ... + 993330.

It is an arithmetic number, because the mean of its divisors is an integer number (167815986).

Almost surely, 2^669277619 is an apocalyptic number.

669277619 is a deficient number, since it is larger than the sum of its proper divisors (1986325).

669277619 is a wasteful number, since it uses less digits than its factorization.

669277619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986324.

The product of its digits is 1714608, while the sum is 53.

The square root of 669277619 is about 25870.4004414311. The cubic root of 669277619 is about 874.7194176283.

The spelling of 669277619 in words is "six hundred sixty-nine million, two hundred seventy-seven thousand, six hundred nineteen".